how envato make sure that my code canyon project not re-submitted by buyers

I am going to submit an ecommerce template… what happens if a developer also a buyer of my template submits with few modifcations.

There’s no guaranteed way of doing this.

Generally someone spots similarities if it gets through the review process and will report it to envato to be removed.

If absolute protection of your item is crucial then submitting to stock marketplaces (regardless of which) is prob not the best idea